Terms of service

1. Who we are

Tailwind is operated by KCJV Industries LLC. “We”, “us” and “our” mean KCJV Industries LLC. You can reach us at support@tailwindstudy.com.

2. What Tailwind is — and isn’t

Tailwind is study material for FAA pilot certification, organized around the Airman Certification Standards: written chapters, practice questions and tests, an automated practice oral, daily review, and interactive diagrams. The course uses the Cessna 172S as its example airplane.

Tailwind is not flight instruction, and it does not replace:

• a certificated flight instructor, or the training, endorsements and sign-offs only an instructor can give;
• official FAA publications — the regulations, the ACS, the handbooks and the AIM — which always control;
• the Pilot’s Operating Handbook or Airplane Flight Manual for the airplane you actually fly; or
• your own judgment as pilot in command.

Using Tailwind does not guarantee that you will pass a knowledge test or practical test, or that you are ready to fly.

3. Your account

• You must be at least 13 years old to use Tailwind, and old enough to form a binding contract where you live to buy a subscription (or have a parent or guardian do it for you).
• Give us a real email address and keep it current; it’s how we reach you about your account and billing.
• One account is for one person. Don’t share your login or let anyone else use your account.
• Keep your password secret. You’re responsible for what happens under your account. Tell us right away if you think someone else has used it.

4. Subscription and billing

• Tailwind is sold as a monthly subscription to a course. Each course is a separate subscription, billed separately. The regular price is $50 per month for each course. Subscriptions started on or before December 31, 2026 (Central time) are at the launch price of $25 per month. The price you’ll pay, plus any tax, is shown at checkout before you pay.
• Launch price: if you subscribe to a course at the launch price, you keep that price for as long as that subscription stays active. If the subscription ends (for example, you cancel and the paid period runs out, or a payment can’t be collected) and you subscribe again later, you pay the price at that time.
• Your first subscription to a course starts with a 7-day free trial. You enter a card at checkout, but nothing is charged during the trial. When the trial ends, your card is charged $25 (plus any tax) for the first month, and the subscription continues monthly from then. The checkout page shows the date the trial ends. If you’ve subscribed to a course before, there’s no second trial and you’re charged at checkout.
• Payments are processed by Stripe. We never see or store your full card number. Stripe’s own terms and privacy policy apply to the payment.
• Your subscription renews automatically every month, and your payment method is charged at the start of each billing period, until you cancel.
• If a payment fails, we or Stripe may retry it. If it still can’t be collected, access to the course may be paused or ended until the payment is made.
• We may change the price. If we do, we’ll email you at least 30 days before the change takes effect, and the new price applies from your next billing period after that. If you don’t want to pay the new price, cancel before it takes effect. This doesn’t apply to a subscription at the launch price while it stays active.

5. Cancelling

You can cancel anytime on your Account page: “Cancel this course” next to the course, or “Manage billing”, which opens Stripe’s billing portal. “Cancel subscription” in the account menu (your initials, top right) does the same. You don’t need to email us. When you cancel, you won’t be charged again, and you keep access until the end of the billing period you’ve already paid for.

To avoid being charged at all, cancel before your free trial ends. You keep access until the trial’s last day, and then it stops and you pay nothing. If you don’t cancel in time, the first monthly charge is made and the no-refunds rule below applies to it.

6. No refunds

Payments are non-refundable. We don’t give refunds or credits for partial months, unused time, or a subscription you forgot to cancel. This doesn’t limit any right to a refund that the law where you live gives you and that can’t be waived.

7. Acceptable use

Use Tailwind to study. Please don’t:

• share your account, or sell, rent or give access to anyone else;
• copy, download, scrape, crawl or bulk-export the chapters, questions, answers or diagrams, by hand or with software;
• republish, resell, or redistribute Tailwind content, or use it to build a competing product or to train an AI model;
• try to get around the paywall, rate limits or security, or interfere with the service or other users; or
• use the practice oral or any other feature for anything other than studying.

8. Our content and your license

The chapters, questions, model answers, diagrams, design and software are our work and are protected by copyright and other laws. FAA publications are public; our explanations of them are not. While your account is in good standing, we give you a personal, non-exclusive, non-transferable license to use Tailwind for your own study. You may take personal notes and print a page for your own use. Everything else not expressly granted is reserved.

Your answers to quizzes and the practice oral remain yours. You let us store and process them to run the service, grade them, and show you your progress.

9. The AI-graded practice oral

The practice oral is graded automatically by an AI model, not by a person or an examiner. Its grades and feedback can be wrong, incomplete or inconsistent, and they are not a prediction of how a designated pilot examiner will assess you. Check anything that matters against the chapter and the FAA source. To grade an answer, we send it to our AI provider, Anthropic; under our agreement with them it isn’t used to train their models. Don’t put personal or sensitive information in your answers. See our Privacy Policy.

10. Accuracy, and no warranty

We work hard to make Tailwind accurate and cite our sources, but mistakes happen and regulations, publications and procedures change. Before you rely on anything for flight, verify it against current official FAA sources and your airplane’s POH/AFM. Tailwind is provided “as is” and “as available”, without warranties of any kind, express or implied — including accuracy, completeness, fitness for a particular purpose, and uninterrupted or error-free service — to the fullest extent the law allows.

11. Limitation of liability

To the fullest extent the law allows, KCJV Industries LLC and the people who run it are not liable for any indirect, incidental, special, consequential or punitive damages, or for lost data, profits or opportunities, arising from your use of Tailwind — including any decision you make in an aircraft. Our total liability for any claim related to Tailwind is limited to the amount you paid us in the 12 months before the claim arose, or $50 if that is more. Some places don’t allow these limits, so they may not all apply to you.

12. Ending your access

You can stop using Tailwind and cancel at any time. We may suspend or close an account that breaks these terms — for example, by sharing it or copying content — and in that case no refund is due. We may also stop offering Tailwind or a course; if we do, we’ll give you reasonable notice and stop future charges.

You can delete your account yourself under Account › “Delete your account”. You confirm with your password; any subscription is cancelled immediately, access ends straight away, and your account and study progress are deleted. The no-refunds rule above applies to the rest of the billing period. If you can’t sign in, email us at support@tailwindstudy.com.

13. Changes to these terms

We may update these terms. The date at the top shows the latest version. If a change is significant, we’ll email you or post a notice in the app before it takes effect. If you keep using Tailwind after that, the new terms apply; if you don’t agree, cancel your subscription.

14. Governing law

These terms are governed by the laws of the State of Arizona, without regard to its conflict-of-law rules, except where the law where you live requires otherwise.

15. Contact

Questions about these terms, billing or your account: support@tailwindstudy.com, or see the contact page.